I know Cymbdiums like fertilizer...however, they need to grow outside. They absolutely need cooler nights to bloom well.

I think Erythrina indica is one of the more tropical species. They're all pretty tropical, except for E. crista-galli. There's so many Coral trees (Erythrina species) blooming here right now. I've even seen the E. falcata trees in full bloom in Balboa Park (now). E. falcata is one of the few summer-blooming Erthrina species.